/// <summary>
/// Closes the tooltip
/// </summary>
private void CloseToolTip()
{
WINAPI.TOOLINFO ti = new WINAPI.TOOLINFO();
ti.cbSize = Marshal.SizeOf(ti.GetType());
ti.hwnd = GetHandler(moNotifyIcon);
WINAPI.SendMessage(moNativeWindow.Handle, WINAPI.TTM_DELTOOL, 0, ref ti);
OnBalloonTipClosed(this, EventArgs.Empty);
moNativeWindow = new NativeWindow();
}
/// <summary>
/// Finds Systray toolbar
/// </summary>
/// <param name="hwnd">HWND of the window being enumerated</param>
/// <param name="lParam"></param>
/// <returns></returns>
protected bool EnumChildWindowsFunc(IntPtr hwnd, IntPtr lParam)
{
StringBuilder sb = new StringBuilder(256);
WINAPI.GetClassName(hwnd, sb, sb.Capacity);
if (sb.ToString().StartsWith("ToolbarWindow32"))
{
mHWndNotify = hwnd;
mFound = true;
return false;
}
mFound = false;
return true;
}
/// <summary>
/// Gets the NotifyIcon rectangle
/// </summary>
/// <param name="handle">Handle of the NotifyIcon</param>
/// <returns></returns>
private bool GetNotifyIconScreenRect(IntPtr handle)
{
WINAPI.RECT loNotifyIconRecr = new WINAPI.RECT();
if (handle == IntPtr.Zero)
{
return false;
}
// Find tray window
IntPtr hWndTray = WINAPI.FindWindowEx(IntPtr.Zero, IntPtr.Zero, "Shell_TrayWnd", 0);
if (hWndTray == IntPtr.Zero)
return false;
// Find SysTray toolbar
WINAPI.EnumChildWindowsCallback callback = new WINAPI.EnumChildWindowsCallback(EnumChildWindowsFunc);
WINAPI.EnumChildWindows(hWndTray, callback, 0);
if (!mFound)
return false;
mFound = false;
hWndTray = mHWndNotify;
// Get a NotifyIcon rectangle and a tip position
if (WINAPI.GetWindowRect(handle, ref loNotifyIconRecr) == 0)
return false;
if (WINAPI.MapWindowPoints(hWndTray, IntPtr.Zero, ref loNotifyIconRecr, 2) == 0)
return false;
// Here we should analyze where SysTray happens to be - up, left, right or bottom
moPosition.X = loNotifyIconRecr.left;
moPosition.Y = loNotifyIconRecr.top;
return true;
}
public static extern int GetTextExtentPoint32(IntPtr hDC, string String, int stringSize, ref WINAPI.SIZE size);
public static extern int SendMessage(IntPtr hWnd, int Msg, int wParam, out WINAPI.RECT lParam);
/// <summary>
/// Tooltip window proc
/// </summary>
/// <param name="hWnd"></param>
/// <param name="iMsg"></param>
/// <param name="wParam"></param>
/// <param name="lParam"></param>
/// <returns></returns>
protected int WindowProc(IntPtr hWnd, UInt32 iMsg, IntPtr wParam, IntPtr lParam)
{
int height = 0;
int width = 0;
IntPtr nativeProc = WINAPI.GetProp(hWnd, "NATIVEPROC");
if (iMsg == WINAPI.WM_PAINT)
{
// Drow the original tooltip
int liWinProcResult = WINAPI.CallWindowProc(nativeProc, hWnd, iMsg, wParam, lParam);
WINAPI.TOOLINFO ti = new WINAPI.TOOLINFO();
ti.cbSize = Marshal.SizeOf(ti.GetType());
ti.hwnd = GetHandler(moNotifyIcon);
if (ti.hwnd != IntPtr.Zero)
{
// Create graphics object for the tooltip
Graphics loGraphics = Graphics.FromHwnd(hWnd);
WINAPI.RECT rect = new WINAPI.RECT();
WINAPI.RECT rect1 = new WINAPI.RECT();
WINAPI.GetWindowRect(hWnd, ref rect);
// In rect1 - tooltip rectangle
// Calculate text display rectangle to rect
rect1 = rect;
WINAPI.SendMessage(hWnd, WINAPI.TTM_ADJUSTRECT, 0, out rect);
// Width and heigth of the text area
width = rect.right - rect.left;
height = rect.bottom - rect.top;
//Calculate iner rectangle of the text area
rect.left = rect.left - rect1.left;
rect.top = rect.top - rect1.top;
rect.right = rect.left + width;
rect.bottom = rect.top + height;
//Clear text area: 16 pixs - header, 30 pixs from bottom
loGraphics.FillRectangle(new SolidBrush(Color.LightYellow), new Rectangle(rect.left, rect.top + 16, width, height-30));
//Add close button and click handler
// 16 pixs for the button control
moCloseButton.Location = new System.Drawing.Point(rect.right - 16, rect.top);
moCloseButton.AutoSize = false;
moCloseButton.Click += CloseButtonClick;
WINAPI.SetParent(moCloseButton.Handle, hWnd);
//Adding panel to the tooltip below the header
moPanel.Location = new Point(rect.left, rect.top + 16);
WINAPI.SetParent(moPanel.Handle, hWnd);
loGraphics = null;
}
return liWinProcResult;
}
return WINAPI.CallWindowProc(nativeProc, hWnd, iMsg, wParam, lParam);
}
/// <summary>
/// Shows the ballon tooltip
/// </summary>
/// <param name="timeout"></param>
public void ShowBalloonTip(int timeout)
{
//Check if a balloon already is shown or no user control was defined
if (moNativeWindow.Handle != IntPtr.Zero || moPanel == null)
return;
//Get a handle for the notify icon
IntPtr loNotifyIconHandle = GetHandler(moNotifyIcon);
if (loNotifyIconHandle == IntPtr.Zero)
return;
//Trying to find notify icon rectangle on a desktop
if (!GetNotifyIconScreenRect(loNotifyIconHandle))
return;
//Create parameters for a new tooltip window
System.Windows.Forms.CreateParams moCreateParams = new System.Windows.Forms.CreateParams();
// New window is a tooltip and a balloon
moCreateParams.ClassName = WINAPI.TOOLTIPS_CLASS;
moCreateParams.Style = WINAPI.WS_POPUP | WINAPI.TTS_NOPREFIX | WINAPI.TTS_ALWAYSTIP | WINAPI.TTS_BALLOON;
moCreateParams.Parent = loNotifyIconHandle;
// Create the tooltip window
moNativeWindow.CreateHandle(moCreateParams);
//We save old window proc to be used later and replac it our own
IntPtr loNativeProc = WINAPI.SetWindowLong(moNativeWindow.Handle, WINAPI.GWL_WNDPROC, wpcallback);
if (loNativeProc == IntPtr.Zero)
return;
if (WINAPI.SetProp(moNativeWindow.Handle, "NATIVEPROC", loNativeProc) == 0)
return;
// Make tooltip the top level window
if (!WINAPI.SetWindowPos(moNativeWindow.Handle, WINAPI.HWND_TOPMOST, 0, 0, 0, 0, WINAPI.SWP_NOACTIVATE | WINAPI.SWP_NOSIZE))
return;
// Tool tip info. Set a TRACK flag to show it in specified position
WINAPI.TOOLINFO ti = new WINAPI.TOOLINFO();
ti.cbSize = Marshal.SizeOf(ti);
ti.uFlags = WINAPI.TTF_TRACK;
ti.hwnd = loNotifyIconHandle;
//Approximating window size by use of char size
WINAPI.SIZE size = new WINAPI.SIZE();
IntPtr hDC = WINAPI.GetDC(moNativeWindow.Handle);
if (hDC == IntPtr.Zero)
return;
if (WINAPI.GetTextExtentPoint32(hDC, ".", 1, ref size) == 0)
return;
int lines = 1 + moPanel.Height / size.cy;
int cols = moPanel.Width / size.cx;
ti.lpszText = ".";
for (int i = 0; i < lines; i++)
{
for (int j = 0; j < cols; j++)
ti.lpszText += ".";
ti.lpszText += "\r\n";
}
//Add tool to the notify icon
if (WINAPI.SendMessage(moNativeWindow.Handle, WINAPI.TTM_ADDTOOL, 0, ref ti) == 0)
return;
WINAPI.SendMessage(moNativeWindow.Handle, WINAPI.TTM_SETTIPBKCOLOR,
ColorTranslator.ToWin32(Color.LightYellow), ref ti);
WINAPI.SendMessage(moNativeWindow.Handle, WINAPI.TTM_SETTIPTEXTCOLOR,
ColorTranslator.ToWin32(Color.Black), ref ti);
WINAPI.SendMessage(moNativeWindow.Handle, WINAPI.TTM_SETDELAYTIME, Duration.AutoPop, 1000);
WINAPI.SendMessage(moNativeWindow.Handle, WINAPI.TTM_TRACKPOSITION, 0, (moPosition.Y << 16) + moPosition.X);
WINAPI.SendMessage(moNativeWindow.Handle, WINAPI.TTM_SETTITLE, (int)BalloonTipIcon, BalloonTipTitle);
WINAPI.SendMessage(moNativeWindow.Handle, WINAPI.TTM_TRACKACTIVATE, 1, ref ti);
// Raise shown event
OnBalloonTipShown(this, EventArgs.Empty);
// Timeout for the tooltip
moTimer.Interval = timeout;
moTimer.Start();
}
